磁性开关型号LYD-50R 上海临嘉科教仪器有限公司

p1Src=//y1shangxu.yzimgs.com/uploads/391770/20171225-99699942.jpg&p2Src=//y1shangxu.yzimgs.com/uploads/391770/20171225-98583173.jpg&p3Src=//y1shangxu.yzimgs.com/uploads/391770/20171225-87461951.jpg